Anne Perry's magnificent Victorian mysteries established her as one of the world's best known and loved historical novelists. Now, in her vividly imagined World War I novels, Perry's talents "have taken a quantum leap" (The Star-Ledger), and so has the number of her devoted readers. We Shall Not Sleep, the final book in this epic series featuring the dedicated Reavley family, is perhaps the most memorably enthralling of all Perry's novels. After...